Communication terminal device adapted to physical characteristics of telecommunication network and method for adapting communication terminal device to physical characteristics of telecommunication network

• US 20050084080A1
• Filed: 10/18/2004
• Published: 04/21/2005
• Est. Priority Date: 10/18/2003
• Status: Active Grant

• Current Assignee: HP Printing Korea Co., Ltd. (HP Inc.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Eog-Kyu
• Granted Patent: US 7,634,078 B2
• Time in Patent Office: Days
• US Class Current: 379/93.90
• CPC Class Codes: H04N 1/32704 Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
• CPC Class Codes: H04N 1/32708 Telephone
• CPC Class Codes: H04N 1/32728 an off-hook condition
• CPC Class Codes: H04N 1/33323 transmission mode only, e.g. speed
• CPC Class Codes: H04N 1/33361 according to characteristics or the state of the communication line H04N1/33353 and H04N2201/33371 take precedence

Abstract

The communication terminal device includes a handset, a central controller, a telephone network adaptor unit for converting analog signals transmitted/received between telecommunication network and the communication terminal device into digital signals, an interface unit physically isolating the central controller from the telephone network adaptor unit, and transmitting/receiving the converted digital signals between the central controller and the telephone network adaptor unit, and a telephone circuit unit which transmits the voice signals generated by processing the digital signals received from the telephone network adaptor unit to a handset through the interface unit and transmits the digital signals generated by processing the voice signals received from the handset to the telephone network adaptor unit through the interface unit. The telephone network adaptor unit is controlled by the central controller and changes the physical characteristics of the analog signals to be adapted to the physical characteristics of the telecommunication network.

Claims

1. A communication terminal device including a handset for inputting and outputting voice signals, the device comprising:

a central controller;

a telephone network adaptor unit for converting analog communication signals transmitted and received between a telecommunication network and the communication terminal device into digital communication signals;

an interface unit for physically isolating the central controller from the telephone network adaptor unit, and transmitting and receiving the converted digital communication signals between the central controller and the telephone network adaptor unit; and

a telephone circuit unit, which transmits the voice signals generated by processing the digital communication signals received from the telephone network adaptor unit to a handset through the interface unit, and, which transmits the digital communication signals generated by processing the voice signals received from the handset to the telephone network adaptor unit through the interface unit, wherein the telephone network adaptor unit is controlled by the central controller and changes the physical characteristics of the analog communication signals so as to be adapted to the physical characteristics of the telecommunication network.

2. The communication terminal device of claim 1, the device further comprising a facsimile unit for processing facsimile signals from the digital communication signals received from the telephone network adaptor unit through the interface unit, wherein the central controller determines whether the handset is off-hooked or not, so the digital communication signals are delivered to the telephone circuit unit when the handset is determined to be off-hooked, and the digital communication signals are delivered to the facsimile unit when the handset is determined not to be off-hooked.

3. The communication terminal device of claim 2, the device further comprising a memory unit for storing information related to the physical characteristics of one or more telecommunication networks, and wherein the central controller reads the physical characteristics of the telecommunication network to which the communication terminal device connected from the memory unit and controls the telephone network adaptor unit based on the read physical characteristics.

6. The telephone circuit unit of claim 3, the unit comprising:

a signal converting unit for converting the analog communication signals into the digital communication signals received from the interface unit; and

a voice signal processor for processing the analog communication signals transmitted and received between the handset and the signal converter, wherein the voice signal processor changes the physical characteristics of the analog communication signals controlled by the central controller.

7. The telephone circuit unit of the claim 6, the unit further comprising:

an amplifier for amplifying the analog communication signals; and

a digital filter for passing only a predetermined frequency band from the analog communication signals, wherein the amplifier is controlled by the central controller to change the gain of the amplifier, wherein the digital filter is controlled by the central controller to change the frequency band.

8. The interface unit of the claim 1, wherein the interface unit uses a transformer to transmit and receive the digital communication signals between the central controller and the telephone network adaptor unit.

9. The interface unit of the claim 1, wherein the interface unit uses a high voltage capacitor to transmit and receive the digital communication signals between the central controller and the telecommunication network adapting.

4. The telephone network adaptor unit of clam 3, the unit further comprising:

a ring detector for detecting ring signals received from the telecommunication network;

a DC current adjustor generating a direct current for keeping the connection to the telecommunication network when the ring signals are read by the ring detector;

an AC signal processor for processing the analog signals transmitted and received between the telecommunication network and the communication terminal device;

a signal characteristic adjustor for changing physical characteristics of the analog communication signals controlled by the central controller; and

a signal converter for converting the analog communication signals into the digital communication signals.

5. The signal characteristic adjustor of claim 4, the adjustor comprising an amplifier for amplifying the analog communication signals, wherein the amplifier is controlled by the central controller and changes the gain of the amplifier.

10. A method for adapting a communication terminal device to physical characteristics, the method comprising the steps of:

(a) converting the analog communication signals into digital communication signals to be transmitted and received between a telecommunication network and the communication terminal device;

(b) delivering the digital communication signals while physically isolating the telecommunication network from the communication terminal device;

(c) transmitting to the handset the voice signals generated by processing the digital communication signals received from the interface unit, and transmitting to the interface unit the digital communication signals generated by processing the voice signals received from the handset; and

(d) changing the physical characteristics of the analog communication signals so as to be adapted to the physical characteristics of the telecommunication network.

11. The method of the claim 10, the method further comprising the steps of:

(e) determining whether the handset is off-hooked; and

(f) processing the digital communication signals as facsimile signals when determined the handset is not off-hooked.

12. The method of the claim 11, the method further comprising the steps of

(g) storing the information on the physical characteristics of one or more telecommunication network in a memory, wherein changing step (d) reads from the memory the physical characteristics of the telecommunication network to which the communication terminal device is connected and changes the physical characteristics of the analog communication signals based on the read physical characteristics.

13. The method of the claim 12, wherein changing step (d) changes the gain of the amplifier to adapt the amplitude of the analog communication signals to the physical characteristics of the telecommunication network.

14. The method of the claim 12, wherein changing step (d) changes a pass frequency band through the digital filter to adapt the frequency characteristics of the analog communication signals to the physical characteristics of the telecommunication network.

15. The method of the claim 10, wherein the interface unit transmits/receives the digital communication signals with the telephone circuit unit, using a transformer.

16. The method of the claim 10, wherein the interface unit transmits and receives the digital communication signals with the telephone circuit unit, using a high voltage capacitor.